With the current version, if the excluded cookie settings within the “Advanced Caching” panel are left as default, then logged in users will bypass the cache. If you want to change that list, say to add more exclusions, you’ll need to include “wordpress_logged_in” within the regex to continue to bypass the cache for logged in users.
For installs that are using the W3 Total Cache, it should also bypass caching for logged in users by default as well, but that is a checkbox in the W3 Total Cache settings.
Thank you. That answers it. I hope you can answer this other question here. Since you mentioned W3 Total Cache. I was not able to install that plugin even though the latest update of A2 Optimized WP indicates it is supported. The A2 Fixed version also has a warning of it not being supported in the future. How does one use W3 Total Cache? Or is it completely discouraged? Thanks again!
If you have the A2 Fixed version of W3TC installed and active, the optimizations related to caching within A2 Optimized will configure and use W3TC automatically. Otherwise the built-in cache engine is used.